I think we’ll pay extra in the future just to avoid the hassle of United Airlines. True, nothing disastrous happened on our multi-leg trip from Munich to K.C. via Chicago and onto Puerto Vallarta via Denver and home to Munich via San Francisco, but there were many small points of stress that added up into unnecessary headaches, and our longest stretches of flight were on Lufthansa, anyway. The best (shortest) way I can express my disapproval of United is simply a word of thanks to Frontier airlines for picking up the slack when United left us hanging.